Diabrotica octoplagiata Jacoby 1887: 511
BMNH, lectotype, male, verified
Body length 4.9-6.1 mm. Body width 2.7-3.3 mm. Head basic color black. Antennae shape filiform, bi- or tricolored, antennomeres 2-3 yellow, antennomeres 4-8 gradually infuscated, antennomeres 9-11 brussels brown. Maxillary palpi yellow or yellow ocher, labrum black. Pronotum yellow or yellow ocher, subquadrate, bifoveate, with small round foveae, not shagreened. Scutellum piceous or black. Elytra yellow or rufous, maculate with three sharp-edged chestnut maculae on each elytron, sometimes divided into two parts. Elytral epipleura completely yellow, sutural angle of elytra round, punctation dense, coarse. Abdomen yellow or yellow ocher. Tarsi and tibiae black or chestnut, femora yellow or yellow ocher. Aedeagus symmetric, with four internal sac sclerites.
Potential problems with identification
Diabrotica octoplagiata Jacoby is similar to D. variegata Jacoby. They can be separated by the following features: pronotum is yellow in D. octoplagiata, but chestnut in D. variegata; sutural angle of elytra round in D. octoplagiata, but dentiform in D. variegata.